Question

When a compact disc is illuminated by small source of white
light, coloured bands are observed. This is due to
(a) dispersion (b) diffraction
(c) interference (d) reflection

Answer 1

Answer:

b

Explanation:

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Answer 2

Answer: diffraction

The line rulings, each of 0.5 μ m width, on a compact disc function as a diffraction grating. When a small source of light illuminates a disc, diffracted light forms coloured 'lanes' that are composite of the diffraction patterns from the ruling.

Explanation:

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